Metallic lathing



(No Model.)

A. R. PORDYCE. METALLIC LATHING.

No. 557,658. Patented Apr. 7, 1896.

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Nirnn STATES ALEXAXDER R. FORDYCE, OF NEVARK, NEV JERSEY.

METALLIC LATHING.

SPECIFICATION forming part of Letters Patent No. 557' ,658, dated April 7, 1896.

Application iiled November 16, 1895. Serial No. 569,221l (No model.)

To @ZZ whom. it muy concern.-

'Be it known that I, ALEXANDER R. FOR- DYCE, a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Metallic Lathin g, of which the following is a full, clear, and exact description, such as will enable those skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

The invention relates to improvements in metallic skeletons of that class which are adapted to be used in the construction of fireproof walls, ceilings, partitions, tc.

lt relates more particularly to that class of skeletons which is termed metallic lathing,77 which, when attached to suitable supports, forms the foundation for the filling that goes to make the body of such constructions.

lt relates especially to improvements in that kind of lat-hing that is made by providing sheet metal with rows of slots,which break joint, and then expanding the metal so treated. ln lathings of this sort as heretofore made in order to give them the desired strength it is necessary to use sheet metal of considerable thickness or to use numerous auxiliary supports. Then metal of considerable thickness is used, owing to its consequent stiii'ness and want ot' pliability, much trouble is experienced in cutting and forming the lathing. The use of numerous auxiliary supports is also objectionable, especially in the const ruction of thin walls, as the contiguity of the filling is considerably interrupted, and, furthermore, the use of the thick metal and the numerous supports greatly increases the weight of the structure; also, in walls of considerable thickness these lathings do not form a suicient skeleton. The outstanding keys or projections are so shallow that to a considerable depth the filling of such walls is unsupported. rlhis is a serious disadvantage, especially when the filling is in a green state, as it would be very liable to displacement.

In the invention in the present instance it is proposed to overcome these objections to a considerable extent. It consists, primarily,

In this way a lathing is foi-ined which will be considerably stronger than the plane lathing or that corrugated parallel with the direction taken by the perforations, which will allow the use of comparatively thin sheet metal and of fewer auxiliary supports; also, a skeleton can be constructed which will have considerable depth or thickness, which renders it especially applicable to the construction of thick walls, and, furthermore, the engaging' edges of the keys will be greatly lengthened, and thereby a more thorough bonding of the filling will be insured.

rl`he invention further consists in the novel construction and arrangement of parts, such as will be hereinafter fully described, pointed out in the appended claims, and illustra-ted in the accompanying drawings.

In the accompanying drawings, in which similar letters of reference designate corresponding parts, Figure 1 is a plan view of a piece of metallic lathing embodying the invention. Fig. 2 is a similar view showing a sheet of metal after it has been slitted and corrugated, but before it has been expanded. Fig. 3 is a section on the line 3 3 of Fig. 2. Fig. 4 is a section on the line 4f t of Fig. l. Fig. 5 is a section on the line 5 5 of Fig. l. Fig. 6 is a perspective view of a section of the lathing. Fig. 7 is aview similar to that shown in Fig. 2, the slits being straight instead of angular. Fig. Sis a perspective view of a section having straight slits.

In carrying out the invention a metallic plate A of the required dimensions is first provided with rows of parallel angular slots, or straight ones, as shown in Fig. 7, a a., the ends a a. of which break joint with the ends a a of the slots of the adjacent rows. The apexes or angles a2 CL2 of the slits register* that is, they fall one directly beneath the other. After this has been done the plate is corrugated so that the ribs ai; a3 extend at right angles to the general direction taken by the slits. The plate will then have the appearance shown in Fig. 2. The plate is then drawn or expanded, so that the slot will open into uniform geometrical figures of very irregular outlines. Keys of* a4, having ribs a5 a5, will thereby be formed, and the plate will have the general appearance shown in Figs. l and 6. The keys so formed will project in IOO alternate rows from opposite sides of the plate and Will be considerably inclined from the main plane of the plate. This excessive in clination is caused by the corrugations, the key itself being made so stiff thereby that it will not bend when the plate is expanded, while on the other hand the comparatively narrow ribs, owing to the comparatiyely great length of the same, will allow considerable movement of the keys.

lVhile it is preferred to have the slots a-ngular, yet they maybe given any other desired form-straight, for an instance-without departing from the spirit of the invention. Of course where the slots are straight the keys will not have so great an inclination as they will when the slots are angular. Itis also to be observed that a plate so treated will form ornamental screens and maybe used for other decorative purposes.

Having thus described my invention, what l claim, and desire to secure by Letters Patent, is-

l. A lathing consisting of a metallic plate having corrugated keys projecting therefrom, the corrugations extending longitudinally through the said keys, substantially as described.

2. A lathing consisting of a corrugated metallic plate, slitted and expanded, the corrugations extending through the slitted portion of the plate and at right angles to the general direction taken by the slits, substantially as described.

3. A lathing consisting of a corrugated metallic plate provided with rows of angular slits which break joint, and expanded to throw keys from opposite sides of the plate, substantially as described.

et. A lathing consisting of a metallic plate provided with rows of angular slits, which break joint, and expanded to throw keys from opposite sides of the plate, substantially as described.

5. A lathing consisting of a metallic plate having corrugated keys projecting from the opposite sides thereof and pointing in opposite directions, substantially as described.

6. A lathing consisting of a metallic plate having corrugated keys projecting from the same in alternate rows on opposite sides and pointing in opposite directions, substantially as described.

7. In a metallic lathin g, the combination of the corrugated keys and the corrugated ribs connecting the same, substantially as described.

In testimony whereof I hereunto ax my signature in the presence of two witnesses.

ALEX. R. FORDYGE. llitnesses GRANT BUnRoLGHs, J. Ross CoLHoUN. 

